User contributions
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- 02:33, 20 July 2024 (diff | hist) . . (+49) . . 2024 IMO Problems/Problem 6
- 05:09, 19 July 2024 (diff | hist) . . (+92) . . 2024 IMO Problems/Problem 5
- 04:07, 19 July 2024 (diff | hist) . . (+1,110) . . N 2024 IMO Problems/Problem 5 (Created page with "Turbo the snail plays a game on a board with 2024 rows and 2023 columns. There are hidden monsters in 2022 of the cells. Initially, Turbo does not know where any of the monste...")
- 03:46, 19 July 2024 (diff | hist) . . (+48) . . 2024 IMO Problems/Problem 4
- 05:33, 18 July 2024 (diff | hist) . . (-5) . . 2024 IMO Problems/Problem 3
- 03:59, 18 July 2024 (diff | hist) . . (+72) . . 2024 IMO Problems/Problem 3
- 09:27, 17 July 2024 (diff | hist) . . (+312) . . IMO Problems and Solutions
- 09:24, 17 July 2024 (diff | hist) . . (+106) . . 2024 IMO Problems/Problem 2
- 08:56, 17 July 2024 (diff | hist) . . (+64) . . 2024 IMO Problems/Problem 1
- 09:09, 5 April 2024 (diff | hist) . . (+49) . . 2024 USAMO Problems/Problem 2 (current)
- 21:55, 29 March 2024 (diff | hist) . . (+90) . . 2024 USAMO Problems/Problem 4 (current)
- 21:55, 29 March 2024 (diff | hist) . . (+90) . . 2024 USAMO Problems/Problem 1
- 21:52, 19 August 2023 (diff | hist) . . (+143) . . APMO Problems and Solutions (current)
- 21:51, 19 August 2023 (diff | hist) . . (+2) . . 2023 APMO Problems/Problem 2 (current)
- 21:51, 19 August 2023 (diff | hist) . . (+12) . . 2023 APMO Problems/Problem 2
- 21:51, 19 August 2023 (diff | hist) . . (+318) . . N 2023 APMO Problems/Problem 2 (Created page with "==Problem== Find all integers <math>n</math> satisfying <math>n \ge 2</math> and <math>\frac{\sigma(n)}{p(n)-1}, in which </math>\sigma(n)<math> denotes the sum of all positi...")
- 21:49, 19 August 2023 (diff | hist) . . (+486) . . N 2023 APMO Problems/Problem 1 (Created page with "==Problem== Let <math>n\ge 5</math> be an integer. Consider <math>n</math> squares with side lengths <math>1, 2, \dots , n</math>, respectively. The squares are arranged in t...") (current)
- 21:48, 19 August 2023 (diff | hist) . . (+113) . . APMO Problems and Solutions
- 09:43, 8 August 2023 (diff | hist) . . (+7) . . 2023 IMO Problems/Problem 2
- 09:43, 8 August 2023 (diff | hist) . . (0) . . 2023 IMO Problems/Problem 2
- 23:19, 20 July 2023 (diff | hist) . . (0) . . 2023 IMO Problems/Problem 1
- 07:14, 14 July 2023 (diff | hist) . . (+1) . . 2023 IMO Problems/Problem 6
- 07:14, 14 July 2023 (diff | hist) . . (+862) . . N 2023 IMO Problems/Problem 6 (Created page with "==Problem== Let <math>ABC</math> be an equilateral triangle. Let <math>A_1,B_1,C_1</math> be interior points of <math>ABC</math> such that <math>BA_1=A_1C</math>, <math>CB_1=B...")
- 07:13, 14 July 2023 (diff | hist) . . (+58) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (-1,499) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (+1,499) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (+838) . . N 2023 IMO Problems/Problem 5 (Created page with "==Problem== Let <math>n</math> be a positive integer. A Japanese triangle consists of <math>1 + 2 + \dots + n</math> circles arranged in an equilateral triangular shape such t...")
- 07:10, 14 July 2023 (diff | hist) . . (+113) . . 2023 IMO Problems/Problem 4
- 09:42, 9 July 2023 (diff | hist) . . (+558) . . N 2023 IMO Problems/Problem 3 (Created page with "==Problem== For each integer <math>k \geqslant 2</math>, determine all infinite sequences of positive integers <math>a_1, a_2, \ldots</math> for which there exists a polynomia...")
- 09:42, 9 July 2023 (diff | hist) . . (+949) . . N 2023 IMO Problems/Problem 2 (Created page with "==Problem== Let <math>ABC</math> be an acute-angled triangle with <math>AB < AC</math>. Let <math>\Omega</math> be the circumcircle of <math>ABC</math>. Let <math>S</math> be...")
- 09:40, 9 July 2023 (diff | hist) . . (+426) . . N 2023 IMO Problems/Problem 1 (Created page with "==Problem== Determine all composite integers <math>n>1</math> that satisfy the following property: if <math>d_1,d_2,\dots,d_k</math> are all the positive divisors of <math>n</...")
- 09:37, 9 July 2023 (diff | hist) . . (+315) . . IMO Problems and Solutions
- 09:24, 23 June 2023 (diff | hist) . . (0) . . 2021 IMO Shortlist Problems/C2 (→Problem) (current)
- 09:23, 23 June 2023 (diff | hist) . . (+608) . . N 2021 IMO Shortlist Problems/C2 (Created page with "==Problem== Let <math>n\ge 3</math> be an integer. An integer <math>m\ge n-1</math> is called <math>n</math>-colourful if, given infinitely many marbles in each of <math>n</ma...")
- 09:21, 23 June 2023 (diff | hist) . . (0) . . 2021 IMO Shortlist Problems (current)
- 09:20, 23 June 2023 (diff | hist) . . (-4) . . 2021 IMO Shortlist Problems
- 09:20, 23 June 2023 (diff | hist) . . (+162) . . N 2021 IMO Shortlist Problems (Created page with "Problems from the 2011 IMO Shortlist. == Algebra == == Combinatorics == * C2 == Geometry == == Number Theory ==")
- 09:19, 23 June 2023 (diff | hist) . . (+328) . . IMO Shortlist Problems (current)
- 11:13, 9 June 2023 (diff | hist) . . (+128) . . Fermat's Last Theorem (current)
- 21:37, 2 April 2023 (diff | hist) . . (+609) . . N 2023 USAMO Problems/Problem 5 (Created page with "==Problem== Let <math>n\geq3</math> be an integer. We say that an arrangement of the numbers <math>1</math>, <math>2</math>, <math>\dots</math>, <math>n^2</math> in a <math>n...")
- 21:37, 2 April 2023 (diff | hist) . . (+820) . . N 2023 USAMO Problems/Problem 4 (Created page with "==Problem== A positive integer <math>a</math> is selected, and some positive integers are written on a board. Alice and Bob play the following game. On Alice's turn, she must...")
- 21:34, 2 April 2023 (diff | hist) . . (+16) . . USAMO Problems and Solutions
- 09:36, 25 July 2022 (diff | hist) . . (+6) . . 2022 IMO Problems/Problem 4
- 06:50, 23 July 2022 (diff | hist) . . (+114) . . 2022 IMO Problems/Problem 6
- 06:49, 23 July 2022 (diff | hist) . . (+235) . . N 2022 IMO Problems/Problem 5 (Created page with "==Problem== Find all triples <math>(a,b,p)</math> of positive integers with <math>p</math> prime and <cmath>a^p = b! + p</cmath> ==Solution== https://www.youtube.com/watch?v=...")
- 06:47, 23 July 2022 (diff | hist) . . (0) . . 2022 IMO Problems/Problem 4
- 06:47, 23 July 2022 (diff | hist) . . (+376) . . 2022 IMO Problems/Problem 4
- 09:39, 16 July 2022 (diff | hist) . . (+470) . . N 2022 IMO Problems/Problem 3 (Created page with "==Problem== Let <math>k</math> be a positive integer and let <math>S</math> be a finite set of odd prime numbers. Prove that there is at most one way (up to rotation and refle...")
- 09:37, 16 July 2022 (diff | hist) . . (+410) . . N 2022 IMO Problems/Problem 2 (Created page with "==Problem== Let <math>\mathbb{R}^+</math> denote the set of positive real numbers. Find all functions <math>f : \mathbb{R}^+ \to \mathbb{R}^+</math> such that for each <math>x...")
- 09:36, 16 July 2022 (diff | hist) . . (+1,050) . . N 2022 IMO Problems/Problem 1 (Created page with "==Problem== The Bank of Oslo issues two types of coin: aluminium (denoted A) and bronze (denoted B). Marianne has <math>n</math> aluminium coins and <math>n</math> bronze coin...")
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